KR20160128400A - Bear management device and method and communication system - Google Patents

Abstract

A bearer management device, method and communication system are provided. The method comprises the steps of: receiving by the user equipment an indication message for changing the bearer type of the bearer or releasing the bearer in a double-connection situation transmitted by the base station; And changing the bearer type of the bearer or releasing the bearer according to the display message. With embodiments of the present invention, a user equipment having a dual-connection can seamlessly switch bearers.

Description

[0001] DESCRIPTION [0002] BEAR MANAGEMENT DEVICE AND METHOD AND COMMUNICATION SYSTEM [

The present disclosure relates to the field of communications technology, and more specifically to a bearer management device, method and communication system.

In a heterogeneous network deployed with small cells, a dual connectivity (DC) technique may be used to increase the throughput of user equipment (UE), increase mobility robustness and reduce network signaling overhead .

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of dual connectivity in the related art; As illustrated in Figure 1, the base station is in a connected state and is able to configure dual connectivity for UEs with multi-transmit / receive functionality. When dual connectivity is configured, two different eNBs (eNodeB) schedulers are used to provide radio resources to the UE for data transmission, and the two eNBs are connected to each other via a generally non-ideal backhaul X2 interface.

Here, the eNB holding the S1-MME interface with the mobility management entity (MME) is referred to as a master eNB (MeNB), the service cells associated with the MeNB constitute a master cell group (MCG); Another eNB used only to provide additional radio resources is called a secondary eNB (SeNB), and corresponding service cells associated with SeNB constitute a secondary cell group (SCG).

In Evolved Universal Terrestrial Radio Access Network (E-UTRAN), a bearer refers to a data transmission channel and its configuration, and different bearers may have different configurations to transmit services required at different Quality of Service (QoS). The bearer on the air interface is referred to as a radio bearer (RB), for example the user plane bearer is referred to as a data radio bearer (DRB) and the control plane bearer is called a Signaling Radio Bearer Bearer (SRB). When dual connectivity is configured, RBs can be classified into three types: MCG bearer, SCG bearer and split bearer.

2 is a schematic diagram of a radio protocol stack corresponding to a bearer under dual connectivity. As illustrated in FIG. 2, in terms of a protocol stack, the MCG bearer refers to a bearer that performs corresponding data transmission using only MeNB resources and the corresponding radio protocol stack is located on MeNB only; The SCG bearer refers to a bearer that performs corresponding data transmission using only SeNB resources and on which a radio protocol stack corresponding only to SeNB is located; A split bearer refers to a bearer that uses both MeNB resources and SeNB resources and on which a corresponding radio protocol stack is located on both MeNB and SeNB.

With respect to a UE configured to have double connectivity, the network side determines whether the type of bearer in which the UE's service is configured according to the service attributes of the UE and the network load, i.e., whether the UE's service is configured to be transmitted on the MCG bearer, Or configured to be transmitted on a split bearer.

On the other hand, in the related art, the network supports addition, modification and release of the DRB through the procedure of radio resource management connection reconfiguration (RRCConnectionReconfiguration). The configuration (including reconfiguration) and configuration limits of the DRB are described as follows:

- Evolved Packet System (EPS) bearer identity (eps-BearerIdentity). This parameter is configured only when the DRB is established, and can not be configured under other conditions.

- DRB ID (drb-Identity). This parameter remains unchanged during the existence of the DRB.

- Packet Data Convergence Protocol (PDCP) configuration (pdcp-Config). This parameter should be configured when the DRB is established and optionally configured in case of handover and RRC re-establishment, and can not be configured under other conditions.

- Radio Link Control (RLC) configuration (rlc-Config). This parameter must be configured when the DRB is established, and optionally configured under other conditions.

- logical channel ID (logicalChannelIdentity). This parameter is configured only when the DRB is established, and can not be configured under other conditions.

- Logical channel configuration (logicalChannelConfig). This parameter must be configured when the DRB is established, and optionally configured under other conditions.

In general, the network side takes a DRB ID as an anchor for management of the DRB including establishment, modification and release of the RB. It is possible that the target site can not parse the configuration of the eNB by the source site if the target site and the source site have different versions in case the UE's service site is changed (e.g., handed over). At that time, the target site will adopt the entire configuration, and the network side takes the EPS bearer ID as an anchor for RB management including establishment and release of the RB.

Additionally, when dual connectivity is configured, the MeNB and SeNB maintain the configuration of the logical channel independently, including independently configuring the logical channel ID. That is, MeNB and SeNB may configure different RBs of the UE with the same or different logical channel IDs.

For example, in FIG. 2, the logical channel IDs corresponding to bearer 1 and bearer 3 are independently configured by MeNB and SeNB respectively, and they may be the same or different. Similarly, the DRB ID under the dual connectivity situation can also be configured independently by MeNB and SeNB, i.e. MeNB and SeNB can configure different RBs of the UE with the same or different DRB IDs.

It should be noted that the foregoing description of the background art is provided for a clear and complete description of the present disclosure and for an easy understanding by one of ordinary skill in the art. In addition, the technical solutions described above are described in the Background of the Invention and should not be understood as known to those of ordinary skill in the art.

However, in the related art, the inventors have found that, in the related art, a transition from an SCG bearer to an MCG bearer or a split bearer to a MCG bearer will occur under some circumstances, which causes a data dropout resulting in a service interruption, It was found that seamless bearer switching can not be performed.

SUMMARY OF THE INVENTION Embodiments of the present disclosure provide a bearer management device, method and communication system for performing seamless bearer switching on a dual access user equipment.

According to a first aspect of embodiments of the present disclosure, there is provided a bearer management method applied to a user equipment (UE) configured to have dual connectivity,

Receiving an indication message for changing a bearer type of the bearer or releasing the bearer under dual connectivity, which is transmitted by the base station; And

Changing the bearer type of the bearer according to the indication message or releasing the bearer

.

According to a second aspect of embodiments of the present disclosure, there is provided a bearer management apparatus configured in a user equipment (UE) configured to have double connectivity, the bearer management apparatus comprising:

A message receiving unit, configured to receive a display message for changing a bearer type of a bearer or releasing a bearer under dual connectivity, the message being transmitted by a base station; And

A configuration unit configured to change the bearer type of the bearer according to the indication message or to release the bearer

.

According to a third aspect of embodiments of the present disclosure, there is provided a bearer management method applied to a user equipment (UE) configured to have dual connectivity, the bearer management method comprising: Release the part; Or releasing the corresponding SCG resource when all bearers associated with the SCG are released.

According to a fourth aspect of embodiments of the present disclosure, there is provided a bearer management apparatus configured in a user equipment (UE) configured to have dual connectivity, the bearer management apparatus comprising a secondary cell group SCG Release the part; Or a first processing unit configured to release or deactivate a corresponding SCG resource when all bearers associated with the SCG are released.

According to a fifth aspect of embodiments of the present disclosure, there is provided a bearer management method applied to a first base station connected to a user equipment (UE) configured to have dual connectivity,

Detecting that a wireless connection has failed in a UE configured to have dual connectivity; And

Transmitting a request for releasing an associated secondary cell group (SCG) bearer or split bearer to a second base station, causing the second base station to release a corresponding bearer

.

According to a sixth aspect of embodiments of the present disclosure, there is provided a bearer management apparatus configured in a first base station connected to a user equipment (UE) configured to have dual connectivity, the bearer management apparatus comprising:

A detection unit configured to detect that a wireless connection has failed in a UE configured to have dual connectivity; And

A transmission unit configured to transmit a request for releasing an associated secondary cell group (SCG) bearer or split bearer to a second base station and to cause the second base station to release a corresponding bearer

.

According to a seventh aspect of embodiments of the present disclosure, there is provided a bearer management method applied to a second base station connected to a user equipment (UE) configured to have dual connectivity,

Receiving a request for releasing an associated secondary cell group (SCG) bearer or split bearer, which is transmitted by a first base station; And

Releasing the corresponding bearer according to the request to release

.

According to an eighth aspect of embodiments of the present disclosure, there is provided a bearer management apparatus configured at a second base station connected to a user equipment (UE) configured to have dual connectivity, the bearer management apparatus comprising:

A receiving unit configured to receive a request for releasing an associated secondary cell group (SCG) bearer or split bearer, which is transmitted by a first base station; And

A release unit configured to release a corresponding bearer in response to a request to release

.

According to a ninth aspect of embodiments of the present disclosure, a communication system is provided, the communication system including a user equipment (UE) configured to have dual connectivity,

Changes the bearer type of the bearer or releases the bearer under dual connectivity, transmitted by the base station, changes the bearer type of the bearer according to the indication message, releases the bearer, and transmits the response message to the base station ≪ / RTI > or

Configured to release a portion of a secondary cell group (SCG) corresponding to a split bearer after a radio resource control (RRC) connection reestablishment procedure is triggered; or

When all bearers associated with the SCG are released, they are configured to release the corresponding SCG resources.

According to a tenth aspect of embodiments of the present disclosure, a communication system is provided,

A first base station configured to detect a wireless connection failure in a user equipment (UE) configured to have dual connectivity and transmit a request to a second base station to release an associated secondary cell group (SCG) bearer or split bearer; And

A second base station configured to release a corresponding bearer in response to a request to release and release a related SCG bearer or split bearer, which is transmitted by a first base station,

.

According to another aspect of embodiments of the present disclosure, a computer readable program is provided, which when executed on a user equipment (UE), enables the computer to perform the bearer management method described above at the UE .

According to another aspect of embodiments of the present disclosure, there is provided a storage medium storing a computer-readable program that is capable of executing a bearer management method as described above in a user equipment (UE) do.

According to another aspect of embodiments of the present disclosure, a computer readable program is provided, which, when executed at a base station, enables the computer to perform the bearer management method described above at the base station.

According to another aspect of embodiments of the present disclosure, there is provided a storage medium storing a computer readable program that enables a computer to perform at a base station a bearer management method as described above.

Embodiments of the present disclosure have the following advantageous effects: UEs configured to have dual connectivity by sending bearer types of bearers under dual connectivity, or receiving indication messages for releasing bearers, Seamless bearer switching can be performed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. It should be understood that the scope of the embodiments of the present disclosure is not limited thereto. The embodiments of the present disclosure include many variations, modifications, and equivalents within the scope of the terms of the appended claims.

The features described and / or illustrated in connection with one embodiment may be used in the same or similar manner in one or more other embodiments, and / or may be used in combination or in lieu of features of other embodiments have.

The term " comprise / include ", as used herein, is taken to specify the presence of stated features, integers, steps or components, but is not limited thereby to one or more other features, integers, It should be emphasized that they do not preclude the presence or addition of these groups.

Many aspects of the present disclosure can be best understood with reference to the following drawings. The components in these figures are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the disclosure. In order to facilitate illustrating and illustrating some portions of the disclosure, corresponding portions of the figures may be exaggerated or reduced.
The elements and features illustrated in one drawing or embodiment of the present disclosure may be combined with elements and features illustrated in one or more additional drawings or embodiments. Also, in the figures, like reference numerals designate corresponding components throughout the several views and may be used to indicate corresponding components in more than one embodiment.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of dual connectivity in the related art;
2 is a schematic diagram of a radio protocol stack corresponding to a bearer under dual connectivity.
3 is a schematic diagram of UE movement in a heterogeneous network of an embodiment of the present disclosure;
4 is a schematic diagram of a flow of a bearer management method according to the first embodiment of the present disclosure.
5 is a schematic diagram of another flow of the bearer management method of the first embodiment of the present disclosure;
6 is a schematic diagram of another flow of the bearer management method of the first embodiment of the present disclosure;
7 is a schematic diagram of another flow of the bearer management method of the first embodiment of the present disclosure.
8 is a schematic diagram of another flow of the bearer management method of the first embodiment of the present disclosure.
9 is a schematic diagram of a flow of a bearer management method according to the second embodiment of the present disclosure.
10 is a schematic diagram of another flow of the bearer management method of the second embodiment of the present disclosure.
11 is a schematic diagram of another flow of the bearer management method of the second embodiment of the present disclosure.
12 is a schematic diagram of a flow of the bearer management method of the third embodiment of the present disclosure.
13 is a schematic view of the structure of the bearer management apparatus according to the fourth embodiment of the present disclosure.
14 is a schematic block diagram of a system structure of a UE according to Embodiment 4 of the present disclosure.
15 is a schematic view of the structure of the bearer management apparatus according to the fifth embodiment of the present disclosure.
16 is a schematic view of the structure of the bearer management apparatus according to the sixth embodiment of the present disclosure.
17 is a schematic view of another structure of the bearer management apparatus according to the sixth embodiment of the present disclosure.
18 is a schematic view of the structure of a base station according to Embodiment 6 of the present disclosure.
19 is a schematic diagram of the structure of a communication system according to the seventh embodiment of the present disclosure.

The foregoing and other features of the present disclosure will become apparent by reference to the following description and drawings. In the description and drawings, the specific embodiments of the present disclosure are disclosed in detail as illustrative of some of the ways in which the principles of the present disclosure may be utilized, but the present disclosure is not limited to such embodiments It should be understood that it does not. Rather, the disclosure is to cover all modifications, equivalents, and equivalents falling within the scope of the appended claims.

Under the dual connectivity situation, the network side can determine whether to transport services on the MCG bearer, SCG bearer, or split bearer depending on network load, service attributes and UE location. 3 is a schematic diagram of UE movement in a heterogeneous network of an embodiment of the present disclosure; As illustrated in FIG. 3, the movement path of the UE is indicated by a dotted line. When the UE moves to point A, the network side can deliver one or more bearers of the UE onto the SeNB, which causes a transition from the MCG bearer to the SCG bearer or from the MCG bearer to the split bearer. When the UE moves to point C, the network side may forward one or more bearers of the UE on the SeNB back to the MeNB, which causes a transition from the SCG bearer to the MCG bearer or from the split bearer to the MCG bearer.

In the case of a switchover between bearers, for example from an SCG bearer to an MCG bearer, one way is to release the SCG bearer and then establish the MCG bearer on the MCG to recover the bearer. This approach has the disadvantage that release of the bearer will initially release the PDCP / RLC entity associated with this bearer, thereby causing a data dropout resulting in a service outage. To avoid data dropout, a seamless transition to the bearer has to be performed, i. E. The source SCG bearer is switched to MCG bearer via reconfiguration. A method for performing such a seamless conversion is a problem to be solved by the present application.

Specifically, the embodiments of the present disclosure address mainly the following three problems.

First, as described above, MeNB and SeNB independently configure the logical channel IDs corresponding to the bearers. For example, in FIG. 2, the logical channel IDs configured for MCG bearer 1 and SCG bearer 1 by MeNB and SeNB, respectively, are both LCID = 1. In such a case, if the SCG bearer 1 is seamlessly switched to the MCG bearer, the existing mechanism can not support the modification of the logical channel ID, and the logical channel IDs corresponding to the two bearers on the UE are both LCID = 1 Will exist. Thus, when MAC (Medium Access Control) entity multiplexing / demultiplexing is performed, a multiplexing / demultiplexing error will occur because the logical channels are the same and therefore the data on the network side and the bearers on the logical channels It can not recognize the RB to which it belongs.

Second, assume that RB IDs are configured independently by MeNB and SeNB. For example, in FIG. 2, the RB IDs configured for MCG bearer 1 and SCG bearer 1 by MeNB and SeNB, respectively, are both DRB = 1 to be. In such a case, if the SCG bearer 1 seamlessly switches to the MCG bearer, the existing mechanism will take the DRB ID as an anchor when performing DRB reconstruction, and therefore DRB ID reconstruction is not supported in such cases. As a result, two MCG bearers with the same DRB ID DRB = 1 will be generated causing confusion of the DRB IDs, and the UE and the network side can not recognize the two bearers.

Third, when the SCG bearer is converted to an MCG bearer, the MeNB may need to reconfigure the PDCP entity corresponding to the MCG bearer, such as modifying the header compression algorithm, because the bearer's service site is considered to be changed So that different configurations of the bearer can be performed by different service sites. In such cases, this functionality can not be supported by existing mechanisms.

With regard to the above-mentioned problems, the embodiments of the present disclosure will be described in detail as follows.

Example 1

This embodiment of the present disclosure provides a bearer management method applied to a UE configured to have dual connectivity. 4 is a schematic diagram of a flow of a bearer management method according to the first embodiment of the present disclosure. As illustrated in Figure 4, the method comprises the following steps:

Step 401: The UE receives an indication message for changing bearer type or releasing the bearer under dual connectivity, which is transmitted by the base station; And

Step 402: the UE changes the bearer type of the bearer according to the indication message or releases the bearer.

As illustrated in FIG. 4, the method may further comprise the steps of:

Step 403: The UE sends a response message to the base station.

In this embodiment, the change in bearer type includes a change from an MCG bearer to an SCG bearer, a change from an SCG bearer to an MCG bearer, a change from an MCG bearer to a split bearer, and a change from an SCG 1 bearer to an SCG 2 bearer Lt; RTI ID = 0.0 > SCG < / RTI > However, the present disclosure is not limited thereto, and the specific situation may be determined according to actual conditions.

In this embodiment, the base station may be one of those that is dual-connected to the UE, e.g., MeNB or SeNB, but the present disclosure is not so limited, and the specific base station may be determined according to actual conditions.

In one embodiment, the indication message comprises first configuration information configured or reconfigured by the base station for a logical channel ID corresponding to the bearer; The method further includes configuring or reconfiguring a logical channel ID corresponding to the bearer according to the first configuration information.

5 is a schematic diagram of another flow of the bearer management method of the first embodiment of the present disclosure; As illustrated in Figure 5, the method comprises the following steps:

Step 501: The base station transmits a Radio Resource Control (RRC) message for changing the bearer type under dual connectivity and reconfiguring the bearer of the modified bearer type. This message includes the logical channel ID corresponding to the bearer by the base station The first configuration information including information of a (re) configuration of the first device;

Step 502: the UE receives the message of step 501, switches the bearer type according to the configuration, and (re) configures the logical channel ID corresponding to the bearer according to the first configuration information; And

Step 503: The UE returns an RRC response message.

In this embodiment, the first configuration information may include a logical ChannelIdentity in the information element DRB-ToAddMod. In terms of existing protocols, this method is described as follows:

The presence condition of the logicalChannelIdentity LCID indicates that this information element must exist when the associated DRB is established and is optionally present when the bearer type is changed (ie, present or nonexistent) It is not allowed to exist under the state.

In another embodiment, the indication message comprises second configuration information for the base station to configure or reconfigure the radio bearer ID corresponding to the bearer; The method further includes configuring or reconfiguring a radio bearer ID corresponding to the bearer according to the second configuration information.

6 is a schematic diagram of another flow of the bearer management method of the first embodiment of the present disclosure; As illustrated in Figure 6, the method comprises the following steps:

Step 601: the base station transmits an RRC message for modifying the bearer type under dual connectivity and for reconfiguring the bearer of the modified bearer type; Comprising second configuration information comprising information;

Step 602: The UE receives the message of step 601, changes the bearer type according to the configuration, re-configures the RB ID corresponding to the bearer, and uses the EPS bearer ID as the anchor, Reconstructing the bearer according to the information; And

Step 603: The UE returns an RRC response message.

In this embodiment, the second configuration information includes the eps-BearIdentity in the information element DRB-ToAddMod. In terms of existing protocols, this method is described as follows:

If the EPS bearer ID included in the DRB Add / Modify list (DRB-ToAddModList) is in the UE's current configuration and the bearer is changing the bearer type,

- apply this DRB ID to the bearer when the configuration information includes the DRB ID;

- apply this PDCP configuration when the configuration information includes a PDCP configuration;

- apply this RLC configuration when the configuration information includes an RLC configuration;

- apply this logical channel ID configuration when the configuration information includes a logical channel ID configuration;

- Apply this logical channel configuration when the configuration information includes a logical channel configuration.

Presence of eps-BearerIdentity The EPS-bearer-ID indicates that: This information element must exist when the associated DRB is established and is optionally present when the bearer type changes under dual connectivity (ie, Or nonexistent), and is not allowed to exist under other conditions.

In another embodiment, the indication message comprises third configuration information for the base station to configure or reconfigure the PDCP ID corresponding to the bearer; The method further includes configuring or reconfiguring a PDCP entity corresponding to the bearer according to the third configuration information.

7 is a schematic diagram of another flow of the bearer management method of the first embodiment of the present disclosure. As illustrated in Figure 7, the method comprises the following steps:

Step 701: the base station transmits an RRC message for modifying the bearer type under dual connectivity and for reconfiguring the bearer of the modified bearer type. This message is transmitted by the base station to the (re) configuration of the PDCP entity corresponding to the bearer by the base station Third configuration information comprising information;

Step 702: the UE receives the message of step 701, changes the bearer type according to the configuration, and (re) configures the PDCP entity corresponding to the bearer according to the third configuration information; And

Step 703: The UE returns an RRC response message.

In this embodiment, the third configuration information includes pdcp-Config in the information element DRB-ToAddMod. In terms of existing protocols, this method is described as follows:

The existence condition of pdcp-config PDCP2 indicates that this information element must exist when the associated DRB is established; When a fully configured intra-E-UTRA handover is not used, when there is a first RRC connection reconfiguration after RRC connection re-establishment, and when bearer (s) configured for dual connectivity, Is selectively present (i.e., present or non-existent) when the type is changed; It is not allowed to exist under other conditions.

In another embodiment, the indication message includes fourth configuration information for releasing the bearer under dual connectivity.

8 is a schematic diagram of another flow of the bearer management method of the first embodiment of the present disclosure. As illustrated in Figure 8, the method comprises the following steps:

Step 801: the base station transmits an RRC message for releasing the bearer under dual connectivity, the message comprising fourth configuration information including release information of the bearer under dual connectivity;

Step 802: the UE receives the message of step 801 and releases the bearer according to the configuration; And

Step 803: The UE returns an RRC response message.

In this embodiment, step 802 is performed when the EPS bearer ID belongs to the current configuration of the UE configured to have double connectivity and is not included in the information element DRB-ToAddMod, Releasing the data radio bearer; Alternatively, step 802 may be performed so that the UE bearer is dual-connected and the UE bearer ID is not included in the information element DRB-ToAddMod while the EPS bearer ID belongs to the current configuration of the UE and the indication message is the first RRC connection reconfiguration message after RRC connection re- When configured, releases the data radio bearer corresponding to the EPS bearer ID according to the fourth configuration information.

Specifically, if the EPS bearer ID belongs to the current configuration of the UE configured to have double connectivity and is not included in the DRB-ToAddModList, or the message is the first RRC connection reconfiguration message after the RRC connection re-establishment, If the UE is configured to have dual connectivity, the UE releases the DRB corresponding to the EPS bearer ID.

As can be seen from the above embodiments, a UE configured to have dual connectivity by sending a notification message for changing the bearer type of the bearer or releasing the bearer under double connectivity, which is transmitted by the base station, .

Example 2

This embodiment of the present disclosure provides a bearer management method applied to a UE configured to have dual connectivity. 9 is a schematic diagram of a flow of a bearer management method according to the second embodiment of the present disclosure. As illustrated in Figure 9, the method comprises the following steps:

Step 901: the UE releases the portion of the secondary cell group (SCG) corresponding to the split bearer; Or releasing the corresponding SCG resource when all bearers associated with the SCG are released.

In one embodiment, the UE may release the SCG portion corresponding to the split bearer after triggering the RRC connection re-establishment procedure.

10 is a schematic diagram of another flow of the bearer management method of the second embodiment of the present disclosure. As illustrated in Figure 10, the method comprises the following steps:

Step 1001: the UE triggers an RRC connection re-establishment procedure; And

Step 1002: After the RRC connection re-establishment procedure is triggered, the UE releases the RB, which is the SCG part corresponding to the SCG bearer and / or the split bearer.

In this embodiment, performing an RRC connection re-establishment procedure for a UE that is configured to have dual connectivity may be performed after the UE has triggered an RRC connection re-establishment procedure in a traditional single connection mode (i.e., connected to MeNB only) , Which includes releasing configurations associated with the SCG, e.g., the UE ID under the SCG, the MAC / PHY configuration corresponding to the SCG, the SCG measurement configuration, and the like.

11 is a schematic diagram of another flow of the bearer management method of the second embodiment of the present disclosure. As illustrated in Figure 11, the method comprises the following steps:

Step 1101: the UE triggers an RRC connection re-establishment procedure; And

Step 1102: After triggering the RRC connection re-establishment procedure, the UE may release the SCG portion corresponding to the split bearer, associate all SCG bearers with the MeNB, i.e., assign those SCG bearers to the MeNB Returning to a traditional single connection mode (i.e., connected only to the MeNB), including associating with the MAC entity and releasing the configurations associated with the SCG. For example, configurations associated with SCG include UE ID under SCG, MAC / PHY configuration corresponding to SCG, SCG measurement configuration, and the like.

In another embodiment, when all bearers associated with one SCG are released, the UE voluntarily releases the corresponding SCG, releasing the SCG includes releasing the SCG configuration, releasing the SCG resource, etc. But this disclosure is not so limited.

In another embodiment, when all bearers associated with the SCG are released, the corresponding SCG may be deactivated. Additionally, the corresponding SCG may not include cells of the SCG that have some of the functionality of the primary cell and are configured to have a PUCCH.

Specifically, when all bearers associated with one SCG are released, the UE voluntarily deactivates the corresponding SCG, which deactivates all secondary cells (Scelles) associated with the corresponding SCG (except for special scellings) . The special SCell refers to an SCG cell having a portion of the functionality of the primary cell (Pcell) and configured to have a PUCCH.

In another embodiment, when a bearer change from a split bearer to a traditional bearer or from a split bearer to an MCG bearer occurs, the PDCP entity may be re-established and / or the transmission of a PDCP status report to the MCG may be triggered. In addition, PDCP data transmission or retransmission may be performed according to the received PDCP status report transmitted from the network side.

Specifically, when a bearer change from a split bearer to a traditional bearer or from a split bearer to an MCG bearer occurs, the UE re-establishes the PDCP entity and / or the UE triggers the transmission of a PDCP status report to the MeNB. In addition, the UE may further perform PDCP data transmission or retransmission according to the received PDCP status report transmitted from the network side, i.e., transmit or retransmit the PDCP packet indicated by the PDCP status report as still not acknowledged by the network side Can be performed.

As can be seen from the above embodiments, a UE configured to have dual connectivity by sending a notification message for changing the bearer type of the bearer or releasing the bearer under double connectivity, which is transmitted by the base station, .

Example 3

This embodiment of the present disclosure provides a bearer management method applied to a base station connected to a UE configured to have dual connectivity.

12 is a schematic diagram of a flow of the bearer management method of the third embodiment of the present disclosure. As illustrated in Figure 12, the method comprises the following steps:

Step 1201: the first base station detects that the radio connection has failed in the UE configured to have double connectivity;

Step 1202: The first base station sends a request to the second base station to release the associated SCG bearer or split bearer.

As illustrated in Figure 12, the method further comprises the following steps.

Step 1203: receiving a request from a second base station to release an associated SCG bearer or split bearer, which is transmitted by the first base station; And

Step 1204: Releasing the corresponding bearer according to the request for releasing by the second base station.

For example, when the UE configured to have dual connectivity detects a radio connection failure, e.g., determining a Radio Link Failure (RLF) at the UE or receiving an RRC connection re-establishment request message, the MeNB sends an associated SCG A request to release the bearer or split bearer is sent to the SeNB, which includes the reason for release of the radio connection with UE Lost or User inactivity. SeNB releases the corresponding bearer.

In another example, when detecting a RLF in a UE that is configured to have dual connectivity, the SeNB sends a request to the MeNB to release the associated SCG bearer or split bearer, Includes the release reason for the activity. MeNB returns a response message.

As can be seen from the above-described embodiment, by releasing the SCG bearer or split bearer at the base station side, the UE configured to have double connectivity can seamlessly switch the bearer.

Example 4

This embodiment of the present disclosure provides a bearer management apparatus configured in a UE configured to have dual connectivity. This embodiment of the present disclosure corresponds to the bearer management method of the first embodiment, and the same contents are omitted.

13 is a schematic view of the structure of the bearer management apparatus according to the fourth embodiment of the present disclosure. As illustrated in FIG. 13, the bearer management apparatus 1300 includes a message receiving unit 1301 and a configuration unit 1302.

Here, the message receiving unit 1301 is configured to receive the indication message for changing the bearer type of the bearer or releasing the bearer under double connectivity, which is transmitted by the base station; The configuration unit 1302 is configured to change the bearer type of the bearer or release the bearer according to the indication message.

As illustrated in FIG. 13, the bearer management device 1300 may further include a message answering unit 1303 configured to send a response message to the base station.

In this embodiment, the indication message includes first configuration information configured or reconfigured by the base station for the logical channel ID corresponding to the bearer, or second configuration information configured or reconfigured by the base station for the radio bearer ID corresponding to the bearer, , Or third configuration information configured or reconfigured by the base station for the PDCP entity corresponding to the bearer, or fourth configuration information for releasing the bearer under dual connectivity.

Here, the configuration unit 1302 configures or reconfigures the logical channel ID corresponding to the bearer according to the first configuration information; Or configure or reconfigure a radio bearer ID corresponding to the bearer according to the second configuration information; Or to configure or reconfigure the PDCP entity corresponding to the bearer according to the third configuration information.

The configuration unit 1302 releases the DRB corresponding to the EPS bearer ID according to the fourth configuration information when the EPS bearer ID belongs to the current configuration of the UE configured to have double connectivity and is not included in the information element DRB-ToAddMod ; Or the EPS bearer ID belongs to the UE's current configuration and is not included in the information element DRB-ToAddMod, the indication message including the fourth configuration information is the first RRC connection reconfiguration message after the RRC connection reestablishment, , It can be further configured to release the DRB corresponding to the EPS bearer ID according to the fourth configuration information.

In this embodiment, the first configuration information includes logicalChannelIdentity in the information element DRB-ToAddMod, the logical channel ID corresponding to logicalChannelIdentity exists when the associated DRB is established; Or the second configuration information includes eps-BearIdentity in the information element DRB-ToAddMod, the EPS bearer ID corresponding to eps-BearIdentity exists when the associated DRB is established; Or the third configuration information includes pdcp-Config in the information element DRB-ToAddMod, and PDCP information corresponding to pdcp-Config exists when the associated DRB is established.

Here, the logical channel ID corresponding to logicalChannelIdentity may also be present when the bearer type is changed for the UE (s) configured to have double connectivity; Or the EPS bearer ID corresponding to eps-BearIdentity may also exist when the bearer type is changed for the UE (s) configured to have double connectivity; Or the PDCP information corresponding to the pdcp-Config may be transmitted to the UE (s) configured to have dual connectivity, when the fully configured E-UTRA handover is not being used, or during the first RRC connection reconfiguration after RRC connection re- Lt; / RTI > may also be present while the bearer type is being changed.

This embodiment of the present disclosure further provides a UE comprising the bearer management device 1300 described above.

14 is a schematic block diagram of the system architecture of UE 1400 in the fourth embodiment of the present disclosure. 14, the UE 1400 may include a central processing unit (CPU) 100 and a memory 140 coupled to the CPU 100. As shown in FIG. It should be noted that this figure is exemplary and that other types of structures may also be used to supplement or replace the structure to realize a telecommunication function or other function.

In one embodiment, the functions of the bearer management device 1300 may be integrated into the CPU 100, and the CPU 100 may be configured to implement the bearer management method of the first embodiment.

In another embodiment, the bearer management apparatus 1300 may be configured as being separate from the CPU 100. [ For example, the bearer management apparatus 1300 may be configured as a chip connected to the CPU 100, and its functions are realized under the control of the CPU.

14, the UE 1400 may further include a communication module 110, an input unit 120, an audio processing unit 130, a display 160, and a power source 170. [ It should be noted that the UE 1400 does not necessarily include all the parts as illustrated in FIG. In addition, the UE 1400 may also include portions not illustrated in FIG. 14 (see related art).

As illustrated in Figure 14, the CPU 100 is sometimes referred to as a controller or an operating widget, which may include a microprocessor or other processor device and / or logic device. The CPU 100 receives inputs and controls the operations of the respective portions of the UE 1400.

Here, the memory 140 may be, for example, a buffer, a flash memory, a floppy, a removable medium, a volatile memory, a non-volatile memory or any other suitable device. It may store failure-related information and information related to program execution. In addition, the CPU 100 may execute a program stored in the memory 140 to store or process information. The functions of the other parts are similar to those in the related art and are omitted here. Portions of UE 1400 may be implemented by dedicated hardware, firmware, software, or a combination thereof without departing from the scope of the present disclosure.

As can be seen from the above embodiments, a UE configured to have dual connectivity by sending a notification message for changing the bearer type of the bearer or releasing the bearer under double connectivity, which is transmitted by the base station, .

Example 5

This embodiment of the present disclosure provides a bearer management apparatus configured in a UE configured to have dual connectivity. This embodiment of the present disclosure corresponds to the bearer management method of the second embodiment, and the same contents are omitted.

15 is a schematic view of the structure of the bearer management apparatus according to the fifth embodiment of the present disclosure. As illustrated in FIG. 15, the bearer management device 1500 may release the SCG portion corresponding to the split bearer; Or a first processing unit 1501 configured to release or deactivate the corresponding SCG when all bearers associated with the SCG are released.

In one embodiment, as illustrated in FIG. 15, the bearer management device may further comprise a triggering unit 1502 configured to trigger an RRC connection re-establishment procedure; After the triggering unit 1502 triggers the RRC connection re-establishment procedure, the first processing unit 1501 is configured to release the SCG portion corresponding to the SCG bearer and / or the split bearer.

Here, the triggering unit 1502 is further configured to release the configuration associated with the SCG. Alternatively, the first processing unit 1501 is further configured to associate the MAC entity corresponding to the MCG with the SCG bearer and release the configuration associated with the SCG.

In another embodiment, the first processing unit 1501 is configured to deactivate the corresponding SCG when all of the bearers associated with the SCG are released, and the corresponding SCG has a portion of the functionality of the primary cell and is configured to have a PUCCH It may not include the cells of the SCG.

In another embodiment, as illustrated in FIG. 15, the bearer management device may re-establish and / or re-establish the PDCP entity when a bearer change from a split bearer to a traditional bearer or from a split bearer to an MCG bearer occurs. And a second processing unit 1503 configured to trigger transmission of the PDCP status report.

As illustrated in FIG. 15, the bearer management apparatus may further include a transmission unit 1504 configured to perform PDCP data transmission or retransmission according to a received PDCP status report transmitted from the network side.

This embodiment of the present disclosure further provides a UE comprising the bearer management device 1500 described above, see Figure 14 for the structure of the UE.

As can be seen from the above embodiments, a UE configured to have dual connectivity by sending a notification message for changing the bearer type of the bearer or releasing the bearer under double connectivity, which is transmitted by the base station, .

Example 6

This embodiment of the present disclosure provides a bearer management apparatus configured in a base station connected to a UE configured to have dual connectivity. This embodiment of the present disclosure corresponds to the bearer management method of the third embodiment, and the same contents are omitted.

16 is a schematic view of the structure of the bearer management apparatus according to the sixth embodiment of the present disclosure. 16, the bearer management apparatus 1600 includes a detection unit 1601 and a transmission unit 1602, and the detection unit 1601 detects that the radio connection is failed in the UE configured to have double connectivity ≪ / RTI > The transmitting unit 1602 is configured to send a request to release the associated SCG bearer or split bearer to the second base station so that the second base station releases the corresponding bearer.

17 is a schematic view of another structure of the bearer management apparatus according to the sixth embodiment of the present disclosure. 17, the bearer management device 1700 includes a receiving unit 1701 and a releasing unit 1702, and the receiving unit 1701 includes an associated secondary cell group < RTI ID = 0.0 > SCG) bearer or a split bearer; Release unit 1702 is configured to release the corresponding bearer upon request to release.

This embodiment of the present disclosure further provides a base station comprising the bearer management device 1600 or the bearer management device 1700 described above.

18 is a schematic view of the structure of a base station according to Embodiment 6 of the present disclosure. 18, a base station 1800 may include a memory 210 coupled to a CPU 200 and a CPU 200, and the memory 210 may store various data and information processing programs , Executes this program under the control of the CPU 200 to receive various information transmitted from the UE, and transmits the request information to the UE.

In one embodiment, the functions of the bearer management device 1600 or the bearer management device 1700 may be integrated into the CPU 200 and the CPU 200 may be configured to implement the bearer management method of embodiment 3 .

In another embodiment, the bearer management device 1600 or the bearer management device 1700 may be configured as being separate from the CPU 200. [ For example, the bearer management device 1600 or the bearer management device 1700 may be configured as a chip connected to the CPU 200, and its functions are realized under the control of the CPU.

18, the base station 1800 may further include a transceiver 220 and an antenna 230, the functions of which are similar to those in the related art, and are omitted herein do. It should be noted that the base station 1800 does not necessarily include all the parts as illustrated in FIG. In addition, the base station 1800 may also include portions not illustrated in FIG. 18 (see related art).

As can be seen from the above-described embodiment, by releasing the SCG bearer or split bearer at the base station side, the UE configured to have double connectivity can seamlessly switch the bearer.

Example 7

This embodiment of the present disclosure provides a communication system, and the same contents as those in Embodiments 1 to 6 are omitted.

19 is a schematic diagram of the structure of a communication system according to the seventh embodiment of the present disclosure. 19, the communication system 1900 includes a first base station 1901, a second base station 1902, and a second base station 1902 that maintains dual connectivity with the first base station 1901 and the second base station 1902 UE 1903.

In one embodiment, the UE 1903 receives the indication message for changing the bearer type of the bearer or releasing the bearer under dual connectivity, which is transmitted by the base station; Change the bearer type of the bearer according to the indication message or release the bearer; Response message to the base station.

Here, the indication message may include first configuration information configured or reconfigured by the base station for the logical channel ID corresponding to the bearer, or second configuration information configured or reconfigured by the base station for the radio bearer ID corresponding to the bearer, Third configuration information configured or reconfigured by the base station for the PDCP entity corresponding to the first PDCP entity, or fourth configuration information for releasing the bearer under dual connectivity.

In another embodiment, after triggering the RRC connection re-establishment procedure, the UE 1903 is configured to release the SCG portion corresponding to the SCG bearer and / or the split bearer.

In another embodiment, when all bearers associated with the SCG are released, the UE 1903 is configured to release or deactivate the corresponding SCG.

In another embodiment, the first base station 1901 detects a wireless connection failure at the UE 1903 configured to have dual connectivity and sends a request to the second base station 1902 to release the associated SCG bearer or split bearer. ; The second base station 1902 is configured to receive a request to release the associated SCG bearer or split bearer from the first base station 1901 and release the corresponding bearer upon request to release it.

This embodiment of the present disclosure additionally provides a computer readable program that when executed on a UE enables the computer to perform the bearer management method of embodiment 1 or embodiment 2 in the UE .

This embodiment of the present disclosure further provides a storage medium for storing a computer readable program that enables a computer to perform the bearer management method of embodiment 1 or embodiment 2 in a UE .

This embodiment of the present disclosure further provides a computer readable program that, when executed on a base station, enables the computer to perform the bearer management method of embodiment 3 in a base station.

This embodiment of the present disclosure further provides a storage medium for storing a computer readable program that enables a computer to perform the bearer management method of embodiment 3 in a base station.

The above-described devices and methods of the present disclosure may be implemented by hardware or by a combination of hardware and software. The present disclosure is directed to such a computer readable program, wherein when the program is executed by a logic unit, the logic unit performs the above-described devices or components as described above, or methods or steps as described above . ≪ / RTI > The present disclosure also relates to a storage medium for storing the above-mentioned program, such as a hard disk, a floppy disk, a CD, a DVD and a flash memory and the like.

One or more functional blocks in the figures and / or one or more combinations thereof may be implemented as a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. They may also be implemented as a combination of a DSP and a microprocessor, a plurality of processors, one or more microprocessors in communication with a DSP, or any other such combination of computing devices.

The present disclosure is described above with reference to specific embodiments. It should be understood, however, by those of ordinary skill in the art that such descriptions are illustrative only and are not intended to limit the scope of protection of this disclosure. Various modifications and alterations may be made by one of ordinary skill in the art in accordance with the principles of the present disclosure, and such variations and modifications are also within the scope of the present disclosure.

Claims (18)

A bearer management apparatus configured in a user equipment (UE) configured to have dual connectivity,
A message receiving unit, configured to change a bearer type of a bearer under dual connectivity or receive a display message for releasing the bearer, the message being transmitted by a base station; And
Configured to change the bearer type of the bearer according to the display message or to release the bearer
And the bearer management device. The method according to claim 1,
And a message response unit configured to transmit a response message to the base station. The method according to claim 1,
Wherein the indication message comprises first configuration information configured or reconfigured by the base station for a logical channel ID corresponding to the bearer; Or second configuration information configured or reconfigured by the base station for a radio bearer ID corresponding to the bearer; Or third configuration information configured or reconfigured by the base station for a Packet Data Convergence Protocol (PDCP) entity corresponding to the bearer; Or fourth configuration information for releasing the bearer under dual connectivity. The method of claim 3,
The configuration unit configures or reconfigures the logical channel ID corresponding to the bearer in accordance with the first configuration information; Or configure or reconfigure the radio bearer ID corresponding to the bearer according to the second configuration information; Or configure or reconfigure the PDCP entity corresponding to the bearer according to the third configuration information. The method of claim 3,
The above-
Wherein when the Evolved Packet System (EPS) bearer ID belongs to the current configuration of the UE configured to have double connectivity and is not included in the information element DRB-ToAddMod, the EPS bearer ID Releases a data radio bearer (DRB) corresponding to the data radio bearer (DRB); or
Wherein the indication message including the fourth configuration information is not included in the information element DRB-ToAddMod while the EPS bearer ID belongs to the current configuration of the UE, and the display message including the fourth configuration information includes a first RRC reconfiguration after RRC connection re- When the UE is configured to have dual connectivity, to release the DRB corresponding to the EPS bearer ID according to the fourth configuration information
Wherein the bearer management apparatus comprises: The method of claim 3,
Wherein the first configuration information includes logicalChannelIdentity in the information element DRB-ToAddMod, and the logical channel ID corresponding to the logicalChannelIdentity exists when the bearer type is changed for UE (s) configured to have double connectivity; or
Bearer ID corresponding to the eps-BearIdentity includes the eps-BearIdentity in the information element DRB-ToAddMod, and the EPS bearer ID corresponding to the eps- When it happens; or
The third configuration information includes pdcp-Config in the information element DRB-ToAddMod, and the PDCP information corresponding to the pdcp-Config is changed to the bearer type for the UE (s) configured to have double connectivity The bearer management device. A bearer management device configured in a user equipment (UE) configured to have dual connectivity,
Releasing a portion of a secondary cell group (SCG) corresponding to a split bearer; Or a first processing unit configured to release or deactivate a corresponding SCG when all bearers associated with the SCG are released. 8. The method of claim 7,
Further comprising a triggering unit configured to trigger a radio resource control (RRC) connection re-establishment procedure,
Wherein the first processing unit is configured to release the SCG portion corresponding to the SCG bearer and / or the split bearer after the triggering unit has triggered the RRC connection re-establishment procedure. 9. The method of claim 8,
Wherein the triggering unit is further configured to release a configuration associated with the SCG. 9. The method of claim 8,
Wherein the first processing unit is further configured to associate the SCG bearer with a medium access control (MAC) entity corresponding to a master cell group (MCG) and release the configuration associated with the SCG. 8. The method of claim 7,
Deactivating the corresponding SCG does not include deactivating any cell of the SCG that has partial functions of the primary cell and is configured to have a physical uplink control channel (PUCCH). 8. The method of claim 7,
When re-establishing a Packet Data Convergence Protocol (PDCP) entity and / or sending a PDCP status report to the MCG when a bearer change from the split bearer to a traditional bearer or from the split bearer to a master cell group (MCG) bearer occurs And a second processing unit configured to trigger the second processing unit. 13. The method of claim 12,
And a transmission unit configured to perform PDCP data transmission or retransmission according to a received PDCP status report transmitted from the network side. A bearer management apparatus configured in a first base station connected to a user equipment (UE) configured to have double connectivity,
A detection unit configured to detect that a wireless connection has failed in the UE configured to have double connectivity; And
(SCG) bearer or a split bearer to a second base station, the second base station transmitting a request to release a corresponding secondary cell group
And the bearer management device. A bearer management apparatus configured in a second base station connected to a user equipment (UE) configured to have dual connectivity,
A receiving unit configured to receive a request for releasing an associated secondary cell group (SCG) bearer or split bearer, which is transmitted by a first base station; And
A release unit configured to release a corresponding bearer in response to the release request;
And the bearer management device. A communication system,
A user equipment (UE) configured to have dual connectivity,
The UE includes:
Changing a bearer type of the bearer or releasing the bearer under dual connectivity, transmitted by the base station, changing the bearer type of the bearer according to the indication message, releasing the bearer, To the base station; or
Configured to release a portion of a secondary cell group (SCG) corresponding to a split bearer after a radio resource control (RRC) connection reestablishment procedure is triggered; or
And to release or deactivate the corresponding SCG when all bearers associated with the SCG are released. 17. The method of claim 16,
Wherein the indication message comprises first configuration information configured or reconfigured by the base station for a logical channel ID corresponding to the bearer; Or second configuration information configured or reconfigured by the base station for a radio bearer ID corresponding to the bearer; Or third configuration information configured or reconfigured by the base station for a Packet Data Convergence Protocol (PDCP) entity corresponding to the bearer; Or fourth configuration information for releasing the bearer under dual connectivity. A communication system,
A first base station configured to detect a wireless connection failure in a user equipment (UE) configured to have dual connectivity and transmit a request to a second base station to release an associated secondary cell group (SCG) bearer or split bearer; And
A second base station configured to receive a request for releasing the associated SCG bearer or the split bearer to be transmitted by the first base station and to release a corresponding bearer in response to the request to release;
≪ / RTI >

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